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3.8
ELECTRICAL WIRING
WARNING !
UPS installation and connection must be performed by QUALIFIED SERVICE
PERSONNEL only.
It is the responsibility of the installation technician to ensure that all local and
national electric codes are adhered to.
3.8.1 Utility input connection
NOTE !
Ensure that the AC and DC external circuit breakers are OFF and locked out to
prevent their inadvertent operation.
Do not apply power to the equipment prior to the commissioning by a QUALIFIED
SERVICE ENGINEER.
Before any other input connection, connect and check the grounding wire.
The UPS has available input terminations for the Rectifier and Bypass.
The unit may be powered from a common input source or dual input (option) sources if desired.
Dual Input Configuration Rectifier & Bypass (recommended)
The Bypass and Rectifier inputs are to be powered from different Utility supplies (F1 and F2 inputs).
In this case, when the Rectifier Input Fuses are opened, the Bypass is supplied by the other source.
In this case, REMOVE the interconnection links BR1, BR2 and BR3 on the input
terminals or bus bars. See Fig. 3.9.3-3.
The same power source is to be used for both Bypass Supply and Rectifier Input (input F3).
Bear in mind that when the Utility Fuses are opened there is a supply failure to the Rectifier as well as
to the Bypass.
In this case, the interconnection links BR1, BR2 and BR3 on the input terminals or bus
bars MUST REMAIN CONNECTED. See Fig. 3.9.3-3.
Dual Input Configuration Rectifier & Bypass (option)
Fig. 3.8.1-1 Dual Input Configuration Rectifier & Bypass (option)
1 = Rectifier
2 = Inverter
Modifications reserved
OPM_SGS_ISG_M75_M75_2US_V010.doc
Common Input Rectifier & Bypass
3
= Automatic Bypass
4
= Utility input
Common Input Rectifier & Bypass
Fig. 3.8.1-2 Common Input Rectifier & Bypass
Installation Guide SG Series 750 UL S2 & SG Series 750 T12 UL S2
5 = Load
6 = Battery
Page 24/49
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